CN1947919A - 一种四元合金无铅软钎焊料 - Google Patents
一种四元合金无铅软钎焊料 Download PDFInfo
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- CN1947919A CN1947919A CN 200610114578 CN200610114578A CN1947919A CN 1947919 A CN1947919 A CN 1947919A CN 200610114578 CN200610114578 CN 200610114578 CN 200610114578 A CN200610114578 A CN 200610114578A CN 1947919 A CN1947919 A CN 1947919A
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- Prior art keywords
- lead
- soldering flux
- soft soldering
- quaternary alloy
- free soft
- Prior art date
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- 230000004907 flux Effects 0.000 title claims description 7
- 229910002059 quaternary alloy Inorganic materials 0.000 title claims description 7
- 238000005476 soldering Methods 0.000 title claims description 7
- 229910052732 germanium Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- 229910001325 element alloy Inorganic materials 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 238000003466 welding Methods 0.000 description 5
- 229910052718 tin Inorganic materials 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910008457 SnGe Inorganic materials 0.000 description 2
- 229910006414 SnNi Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910007637 SnAg Inorganic materials 0.000 description 1
- 229910008433 SnCU Inorganic materials 0.000 description 1
- 229910005728 SnZn Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Nonmetallic Welding Materials (AREA)
Abstract
本发明涉及一种四元合金无铅软钎焊料,其特征在于它由下述重量百分比的原料组成:Bi 1.0~30.0%、Ni 0.01~0.5%、Ge0.01~1.0%和余量Sn,该产品具有熔点低、钎焊接头的结合强度高、钎焊接头组织稳定性优良、抗腐性能好,以减少焊接部位产生裂纹的可能性,确保了焊接强度的优点及效果。
Description
技术领域
本发明涉及一种四元合金无铅软钎焊料,属焊接材料。
技术背景
随着环保法规的日趋完善和严格,虽然锡铅焊料具有优异的润湿性、焊接性、良好的力学性能以及价格便宜等优点,但是铅及其化合物为危害人类健康及污染环境的有毒有害物质,因此无铅钎料在微电子表面组装技术领域中的应用将大大增加。
目前使用的无铅焊料主要是SnCu、SnAg、SnZn二元合金系以及SnAgCu三元合金系,或以此为基础的更多元合金钎料,但有的成本高,有的熔点高。
发明内容
本发明的目的正是为了克服上述已有技术存在的缺点与不足而提供一种具有熔点低、性能好的四元合金无铅软钎焊料,为实现电子信息产品无铅化提供新的无铅焊接材料。
本发明的目的是通过下列技术方案实现的:
一种四元合金无铅软钎焊料,其特征在于它由下述重量百分比的组份组成:
Bi 1.0~30.0%、Ni 0.01~0.5%、Ge 0.01~1.0%
和余量Sn。
本发明的四元合金无铅软钎焊料中Bi用量控制在1.0~30%之间,合金的熔化温度范围较小,Bi元素在焊料中具有降低熔点、改进浸润性的作用,但如果Bi的含量偏高,会出现片状粗大Bi相,造成焊料脆性和抗疲劳性能变差,并且熔化温度范围变宽,使焊接发生困难,为此,本发明提供的无铅焊料中Bi的含量控制在1.0~30%,目的在于获得较低焊料熔点的同时避免出现低熔共晶组织;另外,Ni用量控制在0.01~0.5%之间,通过添加微量的Ni以防止焊料合金片状粗大Bi相的产生,并使得焊料晶粒组织细化,改善焊料的力学性能,以提高焊料合金的塑性和抗腐蚀能力;Ge用量控制在0.01~1.0%之间,锗的加入可以抑制与氧结合而产生金属氧化物,提高焊接部承受热变形应力的热疲劳特性和抗腐蚀性能,防止结晶颗粒粗大化,以减少焊接部位产生裂纹的可能性,确保了焊接强度。而且,由于减少了构成焊料的金属产生金属氧化物的产生量,从而提高了焊接作业的操作性。
本发明的产品配方,选用的各原料的纯度:Sn为99.5%,Bi≥99.5%,Ni、Ge≥99.5%,以Sn为主料,通过以下的方法制造:
(a)首先将Sn与Ni和Ge分别制造SnNi、SnGe中间合金,
(b)将锡先投入锡炉中熔化升温至350℃,然后将Bi加入到锡液中,同时不断搅拌,使其完全熔化后,继续升温待温度再次达到350℃以上,再将SnNi和SnGe中间合金加入到锡铋熔液中,同时不断搅拌,使其完全熔化,保温半小时,使合金均匀化,
(c)去除合金表面的焊料熔渣,在铸膜上浇成产品。
由于采取上述技术方案使本发明技术与已有技术相比具有熔点低、钎焊接头的结合强度高、钎焊接头组织稳定性优良、抗腐性能好以减少焊接部位产生裂纹的可能性,确保了焊接强度的优点及效果。
具体实施方式
实施例
实施例 | 原料组分用量(Kg) | |||
Sn | Bi | Ni | Ge | |
1 | 97.99 | 1.0 | 0.01 | 1.0 |
2 | 94.17 | 5.0 | 0.03 | 0.80 |
3 | 89.45 | 10.0 | 0.05 | 0.50 |
4 | 84.80 | 15.0 | 0.10 | 0.10 |
5 | 79.62 | 20.0 | 0.30 | 0.08 |
6 | 74.55 | 25.0 | 0.40 | 0.05 |
7 | 69.49 | 30.0 | 0.50 | 0.01 |
Claims (1)
1、一种四元合金无铅软钎焊料,其特征在于它由下述重量百分比的原料组成:
Bi 1.0~30.0%、Ni 0.01~0.5%、Ge 0.01~1.0%
和余量Sn。
Priority Applications (1)
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CN 200610114578 CN1947919A (zh) | 2006-11-16 | 2006-11-16 | 一种四元合金无铅软钎焊料 |
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CN 200610114578 CN1947919A (zh) | 2006-11-16 | 2006-11-16 | 一种四元合金无铅软钎焊料 |
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Publication Number | Publication Date |
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CN1947919A true CN1947919A (zh) | 2007-04-18 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110142528A (zh) * | 2011-08-02 | 2019-08-20 | 阿尔法金属公司 | 高冲击韧性的焊料合金 |
-
2006
- 2006-11-16 CN CN 200610114578 patent/CN1947919A/zh active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110142528A (zh) * | 2011-08-02 | 2019-08-20 | 阿尔法金属公司 | 高冲击韧性的焊料合金 |
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